Consider the following schedule of three transactions: r2(y) r1(x) r3(y) r2(x) w2(y) w1(x) r3(x)
a. Define a serialization between T1 and T2.
b. In what apparent order does T3 see the database?
c. Is the schedule serializable?
d. Assuming that each transaction is consistent, does the final database state satisfy
all integrity constraints?
e. Does the database state seen by T3 satisfy all integrity constraints? Explain.
a. T2, T1
b. T1, T2
c. No
d. yes.
e. Yes. T3 is a read-only transaction. The read/write transactions, T1 and T2, are
serializable and hence the final database satisfies all integrity constraints.
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